One quart of copper plating solution acid base containing no cyanide. Use with copper anode as a pre-plating for most gold plate or as a test plating. Produces black oxide background in 1 minute on brass or copper base metals. Due to shipping restrictions this product can only ship UPS Ground or Priority Mail in the continental United States. Essential for Jewelry Repair and Jewelry Making Please contact us with any questions. Please visit our store for other great jewelry tooling items such as; Hand Stamps, Disc Cutters, Polishing Compound, Buffers, Hammers, Tweezers, Mandrels, Anvils, Vises and more! Thanks for Looking!